kolan
/
Cairo-Chart
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Show cursors crossings values.

This commit is contained in:
Kolan Sh 2017-12-10 03:42:29 +03:00
parent f4b89194d6
commit c676f7eea0
1 changed files with 183 additions and 50 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

205
src/Chart.vala
View File

@ -463,12 +463,12 @@ namespace Gtk.CairoChart {
process_legend (LegendProcessType.DRAW);
}
int axis_rec_npoints = 128;
protected int axis_rec_npoints = 128;
protected virtual void calc_axis_rec_sizes (Axis axis, out double max_rec_width, out double max_rec_height, bool is_horizontal = true) {
max_rec_width = max_rec_height = 0;
for (var i = 0; i < axis_rec_npoints; ++i) {
Float128 x = axis.zoom_min + (axis.zoom_max - axis.zoom_min) / axis_rec_npoints * i;
Float128 x = (int64)(axis.zoom_min + (axis.zoom_max - axis.zoom_min) / axis_rec_npoints * i) + 1.0/3.0;
switch (axis.type) {
case Axis.Type.NUMBERS:
var text = new Text (axis.format.printf((LongDouble)x) + (is_horizontal ? "_" : ""));
@ -477,18 +477,19 @@ namespace Gtk.CairoChart {
max_rec_height = double.max (max_rec_height, text.get_height(context));
break;
case Axis.Type.DATE_TIME:
var dt = new DateTime.from_unix_utc((int64)x);
string date, time;
format_date_time(axis, x, out date, out time);
var text = new Text("");
var h = 0.0;
if (axis.date_format != "") {
text = new Text (dt.format(axis.date_format) + (is_horizontal ? "_" : ""));
text = new Text (date + (is_horizontal ? "_" : ""));
text.style = axis.font_style;
max_rec_width = double.max (max_rec_width, text.get_width(context));
h = text.get_height(context);
}
if (axis.time_format != "") {
var dsec_str = ("%."+(axis.dsec_signs.to_string())+"f").printf(1.0/3.0).offset(1);
text = new Text (dt.format(axis.time_format) + (is_horizontal ? "_" : "") + dsec_str);
text = new Text (time + (is_horizontal ? "_" : ""));
text.style = axis.font_style;
max_rec_width = double.max (max_rec_width, text.get_width(context));
h += text.get_height(context);
@ -694,6 +695,15 @@ namespace Gtk.CairoChart {
+ text.get_height(context) * (y - (s.axis_y.zoom_min + s.axis_y.zoom_max) / 2.0) / (s.axis_y.zoom_max - s.axis_y.zoom_min);
}
protected virtual void format_date_time (Axis axis, Float128 x, out string date, out string time) {
date = time = "";
var dt = new DateTime.from_unix_utc((int64)x);
date = dt.format(axis.date_format);
var dsec_str =
("%."+(axis.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
time = dt.format(axis.time_format) + dsec_str;
}
protected virtual void draw_horizontal_axis () {
for (var si = series.length - 1, nskip = 0; si >=0; --si) {
var s = series[si];
@ -756,11 +766,7 @@ namespace Gtk.CairoChart {
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
var dt = new DateTime.from_unix_utc((int64)x);
text = dt.format(s.axis_x.date_format);
var dsec_str =
("%."+(s.axis_x.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
time_text = dt.format(s.axis_x.time_format) + dsec_str;
format_date_time(s.axis_x, x, out text, out time_text);
break;
}
var scr_x = get_scr_x (s, x);
@ -1261,6 +1267,13 @@ namespace Gtk.CairoChart {
protected struct CursorCross {
uint series_index;
Point point;
Point size;
bool show_x;
bool show_date;
bool show_time;
bool show_y;
Point scr_point;
Point scr_value_point;
}
protected struct CursorCrossings {
uint cursor_index;
@ -1311,7 +1324,11 @@ namespace Gtk.CairoChart {
Float128 y = 0.0;
if (vcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]), rel2scr_x(c.x),
plot_area_y_min, plot_area_y_max, out y)) {
CursorCross cc = {si, Point(get_real_x(s, rel2scr_x(c.x)), get_real_y(s, y))};
var point = Point(get_real_x(s, rel2scr_x(c.x)), get_real_y(s, y));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
@ -1319,7 +1336,11 @@ namespace Gtk.CairoChart {
Float128 x = 0.0;
if (hcross(get_scr_point(s, points[i]), get_scr_point(s, points[i+1]),
plot_area_x_min, plot_area_x_max, rel2scr_y(c.y), out x)) {
CursorCross cc = {si, Point(get_real_x(s, x), get_real_y(s, rel2scr_y(c.y)))};
var point = Point(get_real_x(s, x), get_real_y(s, rel2scr_y(c.y)));
Point size; bool show_x, show_date, show_time, show_y;
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
calc_cross_sizes (s, point, out size, show_x, show_time, show_date, show_y);
CursorCross cc = {si, point, size, show_x, show_date, show_time, show_y};
crossings += cc;
}
break;
@ -1334,15 +1355,79 @@ namespace Gtk.CairoChart {
cursors_crossings = local_cursor_crossings;
}
protected virtual void calc_cursors_value_positions () {
for (var ccsi = 0, max_ccsi = cursors_crossings.length; ccsi < max_ccsi; ++ccsi) {
for (var cci = 0, max_cci = cursors_crossings[ccsi].crossings.length; cci < max_cci; ++cci) {
// TODO: Ticket #142: find smart algorithm of cursors values placements
unowned CursorCross[] cr = cursors_crossings[ccsi].crossings;
cr[cci].scr_point = get_scr_point (series[cr[cci].series_index], cr[cci].point);
var d_max = double.max (cr[cci].size.x / 1.5, cr[cci].size.y / 1.5);
cr[cci].scr_value_point = Point (cr[cci].scr_point.x + d_max, cr[cci].scr_point.y - d_max);
}
}
}
protected virtual void cross_what_to_show (Series s, out bool show_x, out bool show_time,
out bool show_date, out bool show_y) {
show_x = show_time = show_date = show_y = false;
switch (cursors_orientation) {
case CursorOrientation.VERTICAL:
show_y = true;
if (!common_x_axes)
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
case CursorOrientation.HORIZONTAL:
if (!common_y_axes) show_y = true;
switch (s.axis_x.type) {
case Axis.Type.NUMBERS: show_x = true; break;
case Axis.Type.DATE_TIME:
if (s.axis_x.date_format != "") show_date = true;
if (s.axis_x.time_format != "") show_time = true;
break;
}
break;
}
}
protected virtual void calc_cross_sizes (Series s, Point p, out Point size,
bool show_x = false, bool show_time = false,
bool show_date = false, bool show_y = false) {
if (show_x == show_time == show_date == show_y == false)
cross_what_to_show(s, out show_x, out show_time, out show_date, out show_y);
size = Point ();
double x_w = 0.0, x_h = 0.0, y_w = 0.0, y_h = 0.0;
string date, time;
format_date_time(s.axis_x, p.x, out date, out time);
var date_t = new Text (date, s.axis_x.font_style, s.axis_x.color);
var time_t = new Text (time, s.axis_x.font_style, s.axis_x.color);
var x_t = new Text (s.axis_x.format.printf((LongDouble)p.x), s.axis_x.font_style, s.axis_x.color);
var y_t = new Text (s.axis_y.format.printf((LongDouble)p.y), s.axis_y.font_style, s.axis_y.color);
double h_x = 0.0, h_y = 0.0;
if (show_x) { size.x = x_t.get_width(context); h_x = x_t.get_height(context); }
if (show_date) { size.x = date_t.get_width(context); h_x = date_t.get_height(context); }
if (show_time) { size.x = double.max(size.x, time_t.get_width(context)); h_x += time_t.get_height(context); }
if (show_y) { size.x += y_t.get_width(context); h_y = y_t.get_height(context); }
if ((show_x || show_date || show_time) && show_y) size.x += double.max(s.axis_x.font_indent, s.axis_y.font_indent);
if (show_date && show_time) h_x += s.axis_x.font_indent;
size.y = double.max (h_x, h_y);
}
protected virtual void draw_cursors () {
if (series.length == 0) return;
var all_cursors = get_all_cursors();
calc_cursors_value_positions();
for (var cci = 0, max_cci = cursors_crossings.length; cci < max_cci; ++cci) {
var low = Point(plot_area_x_max, plot_area_y_max); // low and high
var high = Point(plot_area_x_min, plot_area_y_min); // points of the cursor
var ccs = cursors_crossings[cci].crossings;
unowned CursorCross[] ccs = cursors_crossings[cci].crossings;
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = series[si];
@ -1374,10 +1459,14 @@ namespace Gtk.CairoChart {
break;
}
}
set_line_style(cursor_line_style);
context.move_to (ccs[ci].scr_point.x, ccs[ci].scr_point.y);
context.line_to (ccs[ci].scr_value_point.x, ccs[ci].scr_value_point.y);
context.stroke ();
}
var c = all_cursors.nth_data(cursors_crossings[cci].cursor_index);
var s = series[zoom_first_show];
switch (cursors_orientation) {
case CursorOrientation.VERTICAL:
@ -1387,9 +1476,9 @@ namespace Gtk.CairoChart {
context.line_to (rel2scr_x(c.x), high.y);
context.stroke();
// TODO: show values
if (common_x_axes) {
// show common X value
if (common_x_axes) {
var s = series[zoom_first_show];
var x = get_real_x(s, rel2scr_x(c.x));
string text = "", time_text = "";
switch (s.axis_x.type) {
@ -1397,11 +1486,7 @@ namespace Gtk.CairoChart {
text = s.axis_x.format.printf((LongDouble)x);
break;
case Axis.Type.DATE_TIME:
var dt = new DateTime.from_unix_utc((int64)x);
text = dt.format(s.axis_x.date_format);
var dsec_str =
("%."+(s.axis_x.dsec_signs.to_string())+"Lf").printf((LongDouble)(x - (int64)x)).offset(1);
time_text = dt.format(s.axis_x.time_format) + dsec_str;
format_date_time(s.axis_x, x, out text, out time_text);
break;
default:
break;
@ -1443,11 +1528,6 @@ namespace Gtk.CairoChart {
}
context.stroke ();
// show only Y value
;
} else {
// show [X;Y]
}
break;
case CursorOrientation.HORIZONTAL:
@ -1457,9 +1537,9 @@ namespace Gtk.CairoChart {
context.line_to (high.x, rel2scr_y(c.y));
context.stroke();
// TODO: show values
if (common_y_axes) {
// show common Y value
if (common_y_axes) {
var s = series[zoom_first_show];
var y = get_real_y(s, rel2scr_y(c.y));
var text_t = new Text(s.axis_y.format.printf((LongDouble)y));
var print_y = compact_rec_y_pos (s, y, text_t);
@ -1478,14 +1558,67 @@ namespace Gtk.CairoChart {
show_text(text_t);
context.stroke ();
// show only X value
;
} else
// show [X;Y]
;
}
break;
}
// show value (X, Y or [X;Y])
for (var ci = 0, max_ci = ccs.length; ci < max_ci; ++ci) {
var si = ccs[ci].series_index;
var s = series[si];
var point = ccs[ci].point;
var size = ccs[ci].size;
var svp = ccs[ci].scr_value_point;
var rp = get_real_point(s, rel2scr_point(point));
var show_x = ccs[ci].show_x;
var show_date = ccs[ci].show_date;
var show_time = ccs[ci].show_time;
var show_y = ccs[ci].show_y;
set_source_rgba(bg_color);
context.rectangle (svp.x - size.x / 2, svp.y - size.y / 2, size.x, size.y);
context.fill();
if (show_x) {
set_source_rgba(s.axis_x.color);
var text_t = new Text(s.axis_x.format.printf((LongDouble)point.x));
context.move_to (svp.x - size.x / 2, svp.y + text_t.get_height(context) / 2);
show_text(text_t);
context.stroke();
}
if (show_time) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
format_date_time(s.axis_x, point.x, out date, out time);
var text_t = new Text(time);
var y = svp.y + text_t.get_height(context) / 2;
if (show_date) y -= text_t.get_height(context) / 2 + s.axis_x.font_indent / 2;
context.move_to (svp.x - size.x / 2, y);
show_text(text_t);
context.stroke();
}
if (show_date) {
set_source_rgba(s.axis_x.color);
string date = "", time = "";
format_date_time(s.axis_x, point.x, out date, out time);
var text_t = new Text(date);
var y = svp.y + text_t.get_height(context) / 2;
if (show_time) y += text_t.get_height(context) / 2 + s.axis_x.font_indent / 2;
context.move_to (svp.x - size.x / 2, y);
show_text(text_t);
context.stroke();
}
if (show_y) {
set_source_rgba(s.axis_y.color);
var text_t = new Text(s.axis_y.format.printf((LongDouble)point.y));
context.move_to (svp.x + size.x / 2 - text_t.get_width(context), svp.y + text_t.get_height(context) / 2);
show_text(text_t);
context.stroke();
}
}
}
}
@ -1528,7 +1661,7 @@ namespace Gtk.CairoChart {
chart.selection_style = this.selection_style;
chart.series = this.series.copy();
chart.show_legend = this.show_legend;
chart.title = this.title.copy().copy();
chart.title = this.title.copy();
chart.title_height = this.title_height;
chart.title_vindent = this.title_vindent;
chart.title_width = this.title_width;